<!DOCTYPE html>
<html lang="en">

<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <meta http-equiv="X-UA-Compatible" content="ie=edge">
    <title>Document</title>
</head>

<body>
    <script>
        // function $() {
        //     this.name = 'n2'
        // }
        // $.prototype.name = "n3"
        // $.age = 'n1';
        // console.log($.age)


        // var res = function () { }

        // console.log(res.name)

        // var arr1 = [1, 2, 3],
        //     arr2 = [4, 5, 6];
        // var res = arr1.concat(arr2, 1);
        // console.log(res)

    </script>
</body>

</html>